罗伯特·劳伦斯·库恩

Robert Lawrence Kuhn

饰：Self - Host,54 episodes, 2000-2018, / ...

Doug Vakoch

饰：Self,5 episodes, 2010-2012,

尼尔·德格拉塞·泰森

Neil deGrasse Tyson

饰：Self,3 episodes, 2000,

John Polkinghorne

John Polkinghorne

饰：Self,2 episodes, 2010,

Michael Shermer

Michael Shermer

饰：Self,2 episodes,

Francisco J. Ayala

饰：Self,1 episode, 2000,

丹尼尔·丹尼特

Daniel C. Dennett

饰：Self,1 episode, 2008,

Philip Clayton

饰：Self,1 episode, 2010,

J.P. Moreland

饰：Self,1 episode, 2010,

Thomas Flint

饰：Self,1 episode, 2010,

James D. Tabor

饰：Self,1 episode, 2012,

Susan Blackmore

饰：Self,1 episode, 2012,

Alister McGrath

Alister McGrath

饰：Self,1 episode, 2012,

迈克尔·克莱顿

Michael Crichton

饰：Self,1 episode,

David Baltimore

饰：Self,1 episode,

Terrence Sejnowski

饰：Self,1 episode,

Wallace Sampson

饰：Self,1 episode,

Andrei Linde

饰：Self,1 episode,

Steven Weinberg

Steven Weinberg

饰：Self,1 episode,

Robert Temple

饰：Self,1 episode,

Hyla Cass

饰：Self,1 episode,

Seyyed Hossein Nasr

饰：Self,4 episodes, 2008-2010,

Jill Tarter

饰：Self,3 episodes, 2012,

Nancey Murphy

饰：Self,2 episodes, 2010,

William Craig

饰：Self,2 episodes, 2012,

阿兰·古斯

Alan Guth

饰：Self,2 episodes,

Timothy Ferris

Timothy Ferris

饰：Self,1 episode, 2000,

马丁·里斯

Martin Rees

饰：Self,1 episode, 2012,

William Dembski

William Dembski

饰：Self,1 episode, 2012,

Frank Drake

饰：Self,1 episode, 2012,

奥克塔维娅·E.巴特勒

Octavia Butler

饰：Self,1 episode,

大卫·布林

David Brin

饰：Self,1 episode,

David L. Goodstein

饰：Self,1 episode,

Portia Iversen

饰：Self,1 episode,

Donald Miller

Donald Miller

饰：Self,1 episode,

Murray Gell-Mann

饰：Self,1 episode,

Stuart Hameroff

Stuart Hameroff

饰：Self,1 episode,

Tito Mukhopadhyay

Tito Mukhopadhyay

饰：Self,1 episode,

Soma Mukhopadhyay

Soma Mukhopadhyay

饰：Self,1 episode,